Arsen sits next to 4 phonetic neighbors — Arsenio, Jason, and Arsen are the closest matches by sound. Most share Arsen's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"strong, virile, masculine"
"little one"
"God is my help"
"lordly, masterful"
"man, husband"
"war, strife"
"gift of God"
"fire, blaze (folk association)"
"defender of men, protector of the people"
"of uncertain meaning, possibly healer"
"wrathful, to cause pain"
"fortune, chance"
"joyful celebration"
"gift of Artemis, safe and sound"
"completion, eternity"
"remedy, cure"
"noble, handsome"
"prosperity, abundance"
"derived from the Aras River"
Similar sound: These names share phonetic patterns with Arsen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Arsen.
Rhythm: Arsen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.